CK2610 looses power at half tank fuel

[RandyT]

I doubt it is the fuel bleed line. But that is easy enough to check. Check it with a hose and a clear mustard jar just like you do the bleeder valve on automotive brakes to get air out of the brake cylinder.

But you may want to take another look at the schematic you posted. Your description while looking at the machine didn't include #7, the fuel feed pump - also called a "lift pump". That pump puts a positive pressure on all the components that come after it. So not "p trap" situation can exist after the lift pump.

There's a problem though.... That schematic diagram you posted might be drawn wrong by the original illustrator....I'm saying that the schematic itself might be in error. It wouldn't hurt to check that out by looking at the fuel system and comparing it with the schematic. Normally mechanical design is to put the filter before the pump. Doing it with the pump before the filter - like the schematic illustration shows - doesn't make sense & my guess is a drawing mistake.

I think this is fixable if you want. I also think it won't make much difference if you don't.

rScotty

Most likely the schematic is correct. My Kioti goes from the tank to the lift pump. Lift pump to filter, and then filter to injection pump.

 

[Coyote_CS2220]

I doubt it is the fuel bleed line. But that is easy enough to check. Check it with a hose and a clear mustard jar just like you do the bleeder valve on automotive brakes to get air out of the brake cylinder.

But you may want to take another look at the schematic you posted. Your description while looking at the machine didn't include #7, the fuel feed pump - also called a "lift pump". That pump puts a positive pressure on all the components that come after it. So not "p trap" situation can exist after the lift pump.

There's a problem though.... That schematic diagram you posted might be drawn wrong by the original illustrator....I'm saying that the schematic itself might be in error. It wouldn't hurt to check that out by looking at the fuel system and comparing it with the schematic. Normally mechanical design is to put the filter before the pump. Doing it with the pump before the filter - like the schematic illustration shows - doesn't make sense & my guess is a drawing mistake.

I think this is fixable if you want. I also think it won't make much difference if you don't.

rScotty

Most likely the schematic is correct. My Kioti goes from the tank to the lift pump. Lift pump to filter, and then filter to injection pump.

Sometimes it is hard to understand what and why they did things-that-way in history?

My experience with filters and fuel pumps is that the filter is always first, otherwise the pump can get gunk buildup which affects operation and at the extreme ceases function.

Back-when maybe they made indestructible fuel pumps, but I am inclined to question this.

Might be worth pulling the fuel pump to clean and see what comes out and if dirty/damaged replace and put an easily changeable large volume filter on the line pre-pump?

Mystery gremlins in electrical and fuel system are vexing!